Algebra I Chapter 6 Review

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Presentation transcript:

Algebra I Chapter 6 Review

1) Solve by substitution. y = x – 1 y = -3x - 5 Chapter 6 Review 1) Solve by substitution. y = x – 1 y = -3x - 5 -5x -4y = 4 6x + 2y = 12

Answer 1) Solve by substitution. y = x – 1 y = -3x - 5 -5x -4y = 4 Chapter 6 Review 1) Solve by substitution. y = x – 1 y = -3x - 5 -5x -4y = 4 6x + 2y = 12 (-1, -2) (4, -6)

2) Solve by elimination. 5x - 4y = -3 3x - 4y = -5 3y = 4x - 12 Chapter 6 Review 2) Solve by elimination. 5x - 4y = -3 3x - 4y = -5 3y = 4x - 12 3x - 2y = 9

Answer 2) Solve by elimination. 5x - 4y = -3 3x - 4y = -5 3y = 4x - 12 Chapter 6 Review 2) Solve by elimination. 5x - 4y = -3 3x - 4y = -5 3y = 4x - 12 3x - 2y = 9 (1, 2) (3, 0)

3) Solve by graphing. -5x - 4y = 4 3x + y = 6 Chapter 6 Review 3) Solve by graphing. -5x - 4y = 4 3x + y = 6

3) Solve by graphing. -5x - 4y = 4 3x + y = 6 Answer Chapter 6 Review 3) Solve by graphing. -5x - 4y = 4 3x + y = 6 y 5 -5x - 4y = 4 -4y = 5x + 4 y = -5/4 x -1 x -5 5 (4, -6) 3x + y = 6 y = -3x + 6 -5

Chapter 6 Review 4) Solve. y < 3x - 4 y ≥ x - 1

Answer 4) Solve. y < 3x - 4 y ≥ x - 1 Chapter 6 Review y x 5 -5 5

Chapter 6 Review 5) Solve. y = │x│ - 1 y = x2 - 3

Answer 5) Solve. y = │x│ - 1 y = x2 - 3 Chapter 6 Review (-2, 1) (2, 1) x -5 5 -5

You have 10 coins that total $0.42. Chapter 6 Review 6) Solve. You have 10 coins that total $0.42. Some are nickels, the rest pennies. How many of each type are there?

Answer 6) Solve. You have 10 coins that total $0.42. Chapter 6 Review 6) Solve. You have 10 coins that total $0.42. Some are nickels, the rest pennies. How many of each type are there? 2 pennies and 8 nickels

Chapter 6 Review 7) Solve. An orchestra consists of string instruments and wind instruments in a ratio of 9 to 4. There are 91 total instruments. How many of each instrument are there?

Answer Chapter 6 Review 7) Solve. An orchestra consists of string instruments and wind instruments in a ratio of 9 to 4. There are 91 total instruments. How many of each instrument are there? 28 wind and 63 string